External and minimum shipping container internal dimensions (according to ISO)
The following table summarizes the overall and minimum shipping container internal dimensions defined in ISO 668. General-purpose containers are classified by ISO 668, which specifies the following ISO container sizes, container specs, and other general parameters:
Maximum gross weights: 20′ containers: For general-purpose containers, the maximum container capacity is up to 32,500 kg (71,650 lbs), while for Flatracks it is up to 45,000 kg (99,207 lbs). 40′ and 45′ containers: For general-purpose containers, the maximum weight is 32,500 kg (71,650 lbs). For Flatracks, this is up to 60,000 kg (123,276 lbs) and for reefer containers, it’s up to 35,000 kg (77,161 lbs). Weight limits for road and rail transport: Contact any On-Site Storage Solution office near you for individually valid restrictions.
Floor loads: A forklift truck with a maximum axle load of 5,460 kg (12,037 lbs) might be loaded onto a container floor if the contact surface area per wheel is at least 142 cm2 (22 in2), whereas steel-floor containers can carry up to 9,200 kg (20,282 lbs), as long as they comply with ISO 1496/I.
The maximum spread load should not exceed: for 20′ containers: 4.8 tons (10,582 lbs) per running meter in length, 7.6 tons (16,755 lbs) for steel floor containers only for 40′ containers: 3 tons per running meter in length, and 6.0 tons (6,614 lbs) for steel-floor containers only load must not exceed maximum payload
The gooseneck tunnel on 40′ high cube shipping containers allows the container to fit on a gooseneck chassis and still be under 14’ high. This gooseneck tunnel is a recessed area on the floor that is covered by metal at the bulkhead (front end) of the container.
The recessed area allows the 40’ high cube container to sit lower on the chassis which enables the container to meet height restrictions for most bridges and overpasses.
Timber treatment: Timber exposed to the elements is made ready according to Australian, European, Chinese, and American standards.
Container markings: Containers display the ISO size type code.
Tolerances internal dimensions The interior dimensions and door apertures of On-Site Storage Solutions’ containers meet ISO requirements.
The figures given on the following pages are mere approximations. A variation in measurement is possible as a result of manufacturing tolerances:
Dry van (DV) shipping containers are another name for general purpose containers. These DV containers are the same ones seen stacked on ships, transported by trucks, and in stacks at ports. These dry van shipping containers might have different door configurations depending on their use and are commonly used as a full size container solution for storage and cargo transport.
Also known as Reefers are insulated shipping containers that are used to transport temperature-sensitive cargo. They are usually fitted with a refrigeration unit that controls the temperature inside the container.
Specialty shipping containers have been adapted to transport unusual cargo that won’t fit inside the typical big metal shipping containers. From transporting oversized machinery to liquids, there’s a specialty container for every need.
A side-opening container, also known as an open-sided container, is a shipping container with two extra pairs of bi-fold doors on one of the longer sides in addition to the normal, lockable double doors on one end.
It is also known as a ventilated container because it features four sides with doors. This allows the air to enter and exit the container, which keeps the produce fresher for longer.
Side doors have a bi-fold function, allowing for two different aperture sizes. If you’re dealing with a 20-foot side opening container for example, the first hinges that swing open nearest to the container’s center make for an aperture similar to an 8 feet container opening for easier side access.
You can then expand the side doors even more to create a gap that allows for almost a 20-foot access. As a result, these are frequently known as “full-side access containers.”
A tank shipping container is a cylindrical-shaped container that is used to store and transport dangerous and non-hazardous goods.
ISO tanks are the safest containers for such delicate goods since they are composed of stainless steel and have an insulating and protective layer of aluminum or polyurethane.
The most common types of goods and products transported in ISO tanks are:
ISO-compliant tanks are suitable for intermodal transportation. They also come in 20, 40, and 45-foot versions.
However, capacity is the most important factor to consider when selecting a tank container.
It’s critical to remember that the tank should be at least 80% full at all times. This will avoid the surge during transit. Similarly, you’ll want to make sure the tank is less than 95% full to allow for thermal expansion.
The following table shows the various container size and type codes according to ISO 6346:
Shipping container dimensions form the foundation of modern logistics and storage solutions, guiding how cargo is moved, stored, and protected across global supply chains. From general purpose units to specialized designs, each container type serves a precise role in optimizing space, maintaining compliance, and improving operational efficiency.
That understanding becomes truly valuable when paired with the right storage partner. On-Site Storage Solutions provides high quality storage containers built to ISO standards and engineered for real world performance.
From standard storage units to specialized container solutions, our team helps businesses align container selection with operational goals, site constraints, and regulatory requirements.
To speak with an expert and secure the right container for your project, contact On-Site Storage Solutions at (888) 977-9085.
A 40ft shipping container has an external length of 40 feet, a standard width of 8 feet, and a standard height of 8 feet 6 inches. It provides nearly double the internal cargo space of a 20ft container, making it ideal for large volume shipments.
A 20ft shipping container measures 20 feet long, 8 feet wide, and 8 feet 6 inches high externally. Its compact size makes it suitable for dense cargo, heavy goods, and limited site spaces.
A standard shipping container is typically 20ft or 40ft in length, 8 feet wide, and 8 feet 6 inches high. These dimensions are defined under ISO standards, allowing seamless transport by ship, truck, and rail.
Most standard containers have a width of 8 feet and a height of 8 feet 6 inches. High cube containers increase the height to 9 feet 6 inches for extra vertical cargo space.
To calculate container capacity, multiply the internal length × internal width × internal height. This gives the total cubic volume, which determines how much cargo the container can hold while staying within weight and load limits.
If you’ve ever searched for a shipping container USA online, you probably noticed one thing right away: prices, sellers, and container conditions vary wildly. One
Shipping container modification is changing how people create homes, offices, and storage spaces from strong steel transport units. It transforms a standard shipping container into
Shipping container Miami pricing reflects a fast-moving market shaped by port activity, demand cycles, and local conditions. Buyers who understand how costs are built can
Container transport Miami services are supported by a strong logistics network in South Florida, especially through major port activity in the region. A steady flow
Ocean container shipping from Miami plays a key role in how buyers access affordable containers for storage, transport, and construction use. It connects high-volume port
If you are searching for used shipping containers Miami, you are likely already close to making a purchase and just need final clarity on condition,
